Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 443 · 40 sums

The method (Grow it every year): Year by year: new amount = amount × (100 + R) ÷ 100. Amount after T years = P × (1 + R/100)ᵀ; compound interest = amount − P. A value falling by R% each year: × (100 − R) ÷ 100 every year. For 2 years, CI − SI = P × R × R ÷ 10000.

1. 1.A town has 21000 people. The population grows by 10% every year. What will the population be after 1 year?
2. 2.A town has 16000 people. The population grows by 5% every year. What will the population be after 3 years?
3. 3.What is the difference between the compound interest and the simple interest on ₹32500 at 8% per year for 2 years (in ₹)?
4. 4.Find the compound interest on ₹47500 at 12% per year for 2 years, compounded every year (in ₹).
5. 5.A scooter is worth ₹9200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
6. 6.Find the compound interest on ₹4000 at 10% per year for 3 years, compounded every year (in ₹).
7. 7.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹25900 at 15% per year for 1 year, compounded every year (in ₹).
9. 9.What is the difference between the compound interest and the simple interest on ₹17400 at 20% per year for 2 years (in ₹)?
10. 10.A scooter is worth ₹53600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
11. 11.A scooter is worth ₹25000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
12. 12.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹15000 at 20% per year for 3 years, compounded every year (in ₹).
14. 14.What is the difference between the compound interest and the simple interest on ₹58000 at 25% per year for 2 years (in ₹)?
15. 15.What amount will ₹42500 grow to in 2 years at 12% per year compound interest (in ₹)?
16. 16.A town has 6800 people. The population grows by 12% every year. What will the population be after 1 year?
17. 17.What amount will ₹42100 grow to in 2 years at 20% per year compound interest (in ₹)?
18. 18.A scooter is worth ₹46900. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
19. 19.What amount will ₹33300 grow to in 1 year at 10% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹24000 at 25% per year for 3 years, compounded every year (in ₹).
21. 21.What amount will ₹58500 grow to in 3 years at 20% per year compound interest (in ₹)?
22. 22.Find the compound interest on ₹48400 at 25% per year for 2 years, compounded every year (in ₹).
23. 23.What is the difference between the compound interest and the simple interest on ₹55000 at 4% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹57500 at 8% per year for 2 years, compounded every year (in ₹).
25. 25.A scooter is worth ₹16000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
26. 26.What amount will ₹2500 grow to in 2 years at 8% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹16000 at 10% per year for 3 years, compounded every year (in ₹).
28. 28.A town has 4600 people. The population grows by 20% every year. What will the population be after 1 year?
29. 29.What amount will ₹54800 grow to in 2 years at 25% per year compound interest (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
31. 31.A scooter is worth ₹13600. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
32. 32.What amount will ₹8900 grow to in 1 year at 12% per year compound interest (in ₹)?
33. 33.A scooter is worth ₹58700. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
34. 34.A town has 7200 people. The population grows by 10% every year. What will the population be after 1 year?
35. 35.A town has 45000 people. The population grows by 8% every year. What will the population be after 2 years?
36. 36.What amount will ₹15000 grow to in 2 years at 8% per year compound interest (in ₹)?
37. 37.What amount will ₹11300 grow to in 1 year at 10% per year compound interest (in ₹)?
38. 38.What amount will ₹19200 grow to in 1 year at 12% per year compound interest (in ₹)?
39. 39.A town has 53000 people. The population grows by 4% every year. What will the population be after 1 year?
40. 40.What amount will ₹9600 grow to in 2 years at 25% per year compound interest (in ₹)?

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